apache2::upload.3

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.\" ========================================================================
.\"
.IX Title "Apache2::Upload 3"
.TH Apache2::Upload 3 "2006-08-09" "perl v5.10.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
Apache2::Upload \- Methods for dealing with file uploads.
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&    use Apache2::Upload;
\&
\&    $req = Apache2::Request\->new($r);
\&    $upload = $req\->upload("foo");
\&    $size = $upload\->size;
\&
\&    # three methods to get at the upload\*(Aqs contents ... slurp, fh, io
\&
\&    $upload\->slurp($slurp_data);
\&
\&    read $upload\->fh, $fh_data, $size;
\&    ok $slurp_data eq $fh_data;
\&
\&    my $io = $upload\->io;
\&    print while <$io>;
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Apache2::Upload is a new module based on the original package included
in Apache2::Request 1.X.  Users requiring the upload \s-1API\s0 must now
\&\f(CW\*(C`use Apache2::Upload\*(C'\fR, which adds the \f(CW\*(C`upload\*(C'\fR method to Apache2::Request.
Apache2::Upload is largely backwards-compatible with the original 1.X \s-1API\s0.
See the \*(L"\s-1PORTING\s0 from 1.X\*(R" section below for a list of known issues.
.PP
This manpage documents the Apache2::Upload package.
.SH "Apache2::Upload"
.IX Header "Apache2::Upload"
.Sh "name"
.IX Subsection "name"
.Vb 1
\&    $upload\->name()
.Ve
.PP
The name of the \s-1HTML\s0 form element which generated the upload.
.Sh "filename"
.IX Subsection "filename"
.Vb 1
\&    $upload\->filename()
.Ve
.PP
The (client-side) filename as submitted in the \s-1HTML\s0 form.  Note:
some agents will submit the file's full pathname, while others
may submit just the basename.
.Sh "fh"
.IX Subsection "fh"
.Vb 1
\&    $upload\->fh()
.Ve
.PP
Creates filehandle reference to the upload's spooled tempfile,
which contains the full contents of the upload.
.Sh "io"
.IX Subsection "io"
.Vb 1
\&    $upload\->io()
.Ve
.PP
Creates a tied \s-1IO\s0 handle.  This method is a more efficient version
of \f(CW\*(C`fh\*(C'\fR, but with \f(CW\*(C`io\*(C'\fR the handle ref returned is not seekable.
It is tied to an APR::Request::Brigade object, so you may use the
brigade \s-1API\s0 on the tied object if you want to manipulate the \s-1IO\s0 stream
(beyond simply reading from it).
.PP
The returned reference is actually an object which has \f(CW\*(C`read\*(C'\fR and
\&\f(CW\*(C`readline\*(C'\fR methods available.  However these methods are just
syntactic sugar for the underlying \f(CW\*(C`READ\*(C'\fR and \f(CW\*(C`READLINE\*(C'\fR methods from
APR::Request::Brigade.
.PP
.Vb 2
\&    $io = $upload\->io;
\&    print while $io\->read($_); # equivalent to: tied(*$io)\->READ($_)
.Ve
.PP
See \s-1READ\s0 and \s-1READLINE\s0 below for additional notes
on their usage.
.Sh "bb"
.IX Subsection "bb"
.Vb 2
\&    $upload\->bb()
\&    $upload\->bb($set)
.Ve
.PP
Get/set the APR::Brigade which represents the upload's contents.
.Sh "size"
.IX Subsection "size"
.Vb 1
\&    $upload\->size()
.Ve
.PP
Returns the size of the upload in bytes.
.Sh "info"
.IX Subsection "info"
.Vb 2
\&    $upload\->info()
\&    $upload\->info($set)
.Ve
.PP
Get/set the additional header information table for the
uploaded file.
Returns a hash reference tied to the \fIAPR::Table\fR class.
An optional \f(CW$table\fR argument can be passed to reassign
the upload's internal (apr_table_t) info table to the one
\&\f(CW$table\fR represents.
.PP
.Vb 4
\&    my $info = $upload\->info;
\&    while (my($hdr_name, $hdr_value) = each %$info) {
\&        # ...
\&    }
\&
\&    # fetch upload\*(Aqs Content\-Type header
\&    my $type = $upload\->info\->{"Content\-type"};
.Ve
.Sh "type"
.IX Subsection "type"
.Vb 1
\&    $upload\->type()
.Ve
.PP
Returns the \s-1MIME\s0 type of the given \fIApache2::Upload\fR object.
.PP
.Vb 1
\&    my $type = $upload\->type;
\&
\&    #same as
\&    my $content_type = $upload\->info\->{"Content\-Type"};
\&    $content_type =~ s/;.*$//ms;
.Ve
.Sh "link"
.IX Subsection "link"
.Vb 1
\&    $upload\->link()
.Ve
.PP
To avoid recopying the upload's internal tempfile brigade on a
*nix\-like system, \fIlink\fR will create a hard link to it:
.PP
.Vb 3
\&  my $upload = $req\->upload(\*(Aqfoo\*(Aq);
\&  $upload\->link("/path/to/newfile") or
\&      die sprintf "link from \*(Aq%s\*(Aq failed: $!", $upload\->tempname;
.Ve
.PP
Typically the new name must lie on the same device and partition
as the brigade's tempfile.  If this or any other reason prevents
the \s-1OS\s0 from linking the files, \f(CW\*(C`link()\*(C'\fR will instead
copy the temporary file to the specified location.
.Sh "slurp"
.IX Subsection "slurp"
.Vb 1
\&    $upload\->slurp($contents)
.Ve
.PP
Reads the full contents of a file upload into the scalar argument.
The return value is the length of the file.
.PP
.Vb 1
\&    my $size = $upload\->slurp($contents);
.Ve
.Sh "tempname"
.IX Subsection "tempname"
.Vb 1
\&    $upload\->tempname()
.Ve
.PP
Provides the name of the spool file.
.PP
.Vb 1
\&    my $tempname = $upload\->tempname;
.Ve
.SH "APR::Request::Brigade"
.IX Header "APR::Request::Brigade"
This class is derived from APR::Brigade, providing additional
methods for \s-1TIEHANDLE\s0, \s-1READ\s0 and \s-1READLINE\s0.  To be memory efficient,
these methods delete buckets from the brigade as soon as their
data is actually read, so you cannot \f(CW\*(C`seek\*(C'\fR on handles tied to
this class.  Such handles have semantics similar to that of a
read-only socket.
.Sh "\s-1TIEHANDLE\s0"
.IX Subsection "TIEHANDLE"
.Vb 1
\&    APR::Request::Brigade\->TIEHANDLE($bb)
.Ve
.PP
Creates a copy of the bucket brigade represented by \f(CW$bb\fR, and
blesses that copy into the APR::Request::Brigade class.  This
provides syntactic sugar for using perl's builtin \f(CW\*(C`read\*(C'\fR, \f(CW\*(C`readline\*(C'\fR,
and \f(CW\*(C`<>\*(C'\fR operations on handles tied to this package:
.PP
.Vb 4
\&    use Symbol;
\&    $fh = gensym;
\&    tie *$fh, "APR::Request:Brigade", $bb;
\&    print while <$fh>;
.Ve
.Sh "\s-1READ\s0"
.IX Subsection "READ"
.Vb 3
\&    $bb\->READ($contents)
\&    $bb\->READ($contents, $length)
\&    $bb\->READ($contents, $length, $offset)
.Ve
.PP
Reads data from the brigade \f(CW$bb\fR into \f(CW$contents\fR.  When omitted
\&\f(CW$length\fR defaults to \f(CW\*(C`\-1\*(C'\fR, which reads the first bucket into \f(CW$contents\fR.
A positive \f(CW$length\fR will read in \f(CW$length\fR bytes, or the remainder of the
brigade, whichever is greater. \f(CW$offset\fR represents the index in \f(CW$context\fR
to read the new data.
.Sh "\s-1READLINE\s0"
.IX Subsection "READLINE"
.Vb 1
\&    $bb\->READLINE()
.Ve
.PP
Returns the first line of data from the bride. Lines are terminated by
linefeeds (the '\e012' character), but we may eventually use \f(CW$/\fR instead.
.SH "PORTING from 1.X"
.IX Header "PORTING from 1.X"
.IP "\(bu" 4
\&\f(CW\*(C`$upload\->next()\*(C'\fR is no longer available;  please use the
\&\f(CW\*(C`APR::Request::Param::Table\*(C'\fR \s-1API\s0 when iterating over upload entries.
.IP "\(bu" 4
\&\f(CW\*(C`info($header_name)\*(C'\fR is replaced by \f(CW\*(C`info($set)\*(C'\fR.
.IP "\(bu" 4
\&\f(CW\*(C`type()\*(C'\fR returns only the MIME-type portion of the Content-Type header.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
APR::Request::Param::Table, APR::Request::Error, Apache2::Request,
\&\fIAPR::Table\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
.Vb 1
\&  Copyright 2003\-2006  The Apache Software Foundation
\&
\&  Licensed under the Apache License, Version 2.0 (the "License");
\&  you may not use this file except in compliance with the License.
\&  You may obtain a copy of the License at
\&
\&      http://www.apache.org/licenses/LICENSE\-2.0
\&
\&  Unless required by applicable law or agreed to in writing, software
\&  distributed under the License is distributed on an "AS IS" BASIS,
\&  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
\&  See the License for the specific language governing permissions and
\&  limitations under the License.
.Ve